/// <summary>
/// Gets the result kind of the <paramref name="serviceOperation"/>.
/// </summary>
/// <param name="serviceOperation">The <see cref="IEdmFunctionImport"/> to check.</param>
/// <param name="model">The <see cref="IEdmModel"/> containing the annotation.</param>
/// <returns>The result kind of the <paramref name="serviceOperation"/> or null if no result kind annotation exists.</returns>
public static ODataServiceOperationResultKind?GetServiceOperationResultKind(this IEdmFunctionImport serviceOperation, IEdmModel model)
{
ExceptionUtils.CheckArgumentNotNull(serviceOperation, "functionImport");
ExceptionUtils.CheckArgumentNotNull(model, "model");
ODataQueryEdmServiceOperationAnnotation annotation = model.GetAnnotationValue <ODataQueryEdmServiceOperationAnnotation>(serviceOperation);
return(annotation == null ? null : (ODataServiceOperationResultKind?)annotation.ResultKind);
}
/// <summary>
/// Method that checks whether a function import is a service operation.
/// </summary>
/// <param name="functionImport">The <see cref="IEdmFunctionImport"/> to check.</param>
/// <param name="model">The <see cref="IEdmModel"/> containing annotations.</param>
/// <returns>true if the <paramref name="functionImport"/> represents a service operation; otherwise false.</returns>
/// <remarks>
/// A <see cref="IEdmFunctionImport"/> is considered a service operation if it has the
/// <see cref="ODataQueryEdmServiceOperationAnnotation"/> annotation.
/// </remarks>
private static bool IsServiceOperation(IEdmFunctionImport functionImport, IEdmModel model)
{
Debug.Assert(functionImport != null, "functionImport != null");
Debug.Assert(model != null, "model != null");
// Check whether an annotation on the function import that makes it a service operation exists
ODataQueryEdmServiceOperationAnnotation serviceOperationAnnotation = model.GetAnnotationValue <ODataQueryEdmServiceOperationAnnotation>(functionImport);
return(serviceOperationAnnotation != null);
}
/// <summary>
/// Sets the result kind of the <paramref name="serviceOperation"/>.
/// </summary>
/// <param name="serviceOperation">The <see cref="IEdmFunctionImport"/> to check.</param>
/// <param name="model">The <see cref="IEdmModel"/> containing the annotation.</param>
/// <param name="resultKind">The result kind to set.</param>
public static void SetServiceOperationResultKind(this IEdmFunctionImport serviceOperation, IEdmModel model, ODataServiceOperationResultKind resultKind)
{
ExceptionUtils.CheckArgumentNotNull(serviceOperation, "serviceOperation");
ExceptionUtils.CheckArgumentNotNull(model, "model");
ODataQueryEdmServiceOperationAnnotation existingAnnotation = model.GetAnnotationValue <ODataQueryEdmServiceOperationAnnotation>(serviceOperation);
if (existingAnnotation == null)
{
ODataQueryEdmServiceOperationAnnotation newAnnotation =
new ODataQueryEdmServiceOperationAnnotation
{
ResultKind = resultKind
};
model.SetAnnotationValue(serviceOperation, newAnnotation);
}
else
{
existingAnnotation.ResultKind = resultKind;
}
}